Trolley-harp.



No 717,542. I PATENTED JAN. 6,- 1903.

' F. J. OASWELLfiz-G. G. WOOD.

,, I TROLLEY HARP.

APPLICATION FILED FEB. 10, 1902.

no MODEL.

' %NEYS UNITED STATES ATENT Unmet.

FREDERICK J. GASWELL AND CLARENCE O. WOOD, OF WOODVILLE, MASSACHUSETTS.

TROLLEY-HARP.

SPECIFICATION forming part of Letters Patent No. 717,542, dated January 6, 1903.

Application filed February 10, 1902. Serial No, 93,340. (No model.)

To all whom it ntay concern:

Be it known that we, FREDERICK J. CAS- WELL and CLARENCE 0. W001), citizens of the United States,and residents of Wood ville,

in the county of Middlesex and State of Massachusetts,have invented a new and Improved Trolley-Harp, of which the following is a full, clear, and exact description.

The object of this invention is to insure the proper engagement of the trolley with the wire, notwithstanding that the course may be devious and the road irregular; and it com-' prises certain novel features involving a spring-sustained trolley, which will be fully explained hereinafter and pointed out in the claims. K

This specification is an exact description of one example of our invention,while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the invention. Fig. 2 isa section on the line 2 2 of Fig. 1, and Fig. 3 is a plan view.

or represents the trolley-pole, and b the end extension thereof, which is provided with a reduced part I), (see Fig. 3,) secured in a cavity formed in the pole. The upper end of the extension I) is turned laterally to form a holder 5 and below this holder is arranged a laterally-projecting arm b carried by the extension I).

0 indicates a brace extending between the arm 19 and the pole a, so as firmly to hold the parts a and b engaged and also to brace the arm 19 (1 indicates the trolley-wheel, and d the cheek-plates thereof. Fastened to the plates or shell d is a shank e, which projects downward and is fitted to slide Vertically in the holder 19 This shank has a reduced portion e, projecting below the holder 12 and extending down to an eye in the outer end of the arm 19 these parts 6 and e being loosely ongaged withthe parts 12 and 19 As shown best in Fig. 2, the lower end of the shank eis provided with a transverse key 6 which engages under the holder b to prevent upward movement of the parts above the position shown in Fig. 1, and f indicates an expansive spring, which is placed around the reduced part c of the shank, this spring bearing against the lower end of the main part c of the shank and the arm 5 (See Fig. 2.) The spring f therefore serves to hold the parts yieldingly in the position shown in Figs. 1 and 2; but the shank e andits reduced extension c may move downward relatively to the parts 19 and 12 until the cheeks or shell 01 of the trolley-wheel strike the holder b Fastened to the cheeks d at each side of the trolley-wheel and projecting forwardly are downwardly-curved arms g, which extend down to the extension b of the pole and lie one on each side thereof, the lower ends of the arms 9 being turned in toward each other, as indicated at g. These arms 9 allow the trolley-wheel with its attached shank limited turning movement on the pole; but this movement is notgreat enough to impair the proper engagement of the trolley-Wheel with the wire, while at the same time it allows for freedom of movement necessary for the trolleywheel in turning curves and other irregular portions of the road.- 7

The use of the invention will be apparent from the illustration and the foregoing description, audit will be seen that by means of the construction employed the trolleywheel is allowed to move freely within the necessary scope and that other movements are effectively prevented. The armsg also prevent the trolley-harp from catching against crossing wires, brackets, and other obstructions, since owing to their peculiar form the whole device is caused easily to ride under the obstructions.

Various changes in the form and details of our invention may be resorted to at will without departing from the spirit of our invention. Hence we consider ourselves entitled to all forms of the invention as may lie within the intent of our claims.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. The combination of a trolley-pole having holding devices, a trolley, a shank carrying the trolley, the shank being movably mounted in the holding devices, a spring bearing between the holding devices and the shank, and guards sustained from the shank and located one at each side of the trolley, said guards extending forward and downward and lying one on each side of the pole.

2. The combination with the trolley-pole, of a trolley comprising cheek-plates, means for mounting the trolley on the pole, said means being arranged to turn on the pole, and two guards connected with said cheekplates of the trolley and located one on each side of the trolley, said guards extending forwardly to opposite sides of the pole, for the purpose specified.

3. The combination of a trolley-pole hav ing a laterally-projected arm located near the end of the pole, a holder located at the end of the pole, a shank slidably fitted in the holder and in the arm, a spring yieldingly sup porting the shank, a trolley carried by the shank, and a guard sustained on the trolley and extending forwardly past one side of the pole, for the purpose specified.

In testimony whereof We have signed our names to this specification in the presence of 25 two subscribing Witnesses.

FREDERICK J. CASWELL. CLARENCE C. WOOD.

Witnesses:

GRANBY W001), MARY E. WooD. 

